Use perl from PATH, not from absolute shebang (#2304)

bin/hipcc

@@ -1,4 +1,4 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
 # Copyright (c) 2015 - 2021 Advanced Micro Devices, Inc. All rights reserved.
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -21,6 +21,7 @@
 
 # Need perl > 5.10 to use logic-defined or
 use 5.006; use v5.10.1;
+use warnings;
 use File::Basename;
 use File::Temp qw/ :mktemp  /;
 use Cwd;